<?php
	$arr1=[1,2,3,4];
	$arr2=[
		'a'=>11111111111111,
		'b'=>2,
		'c'=>3,
 	];
 	$arr2['d']=4;//增加
 	$arr2['b']=222;//改
 	unset($arr2['c']);//删除
 	echo $arr2['a'];//查询
 	var_dump($arr1,$arr2);
?>  